How to install Docker Engine on Alpine Linux

Hello Geeky, so today we are focusing on How you can install Docker Engine on Alpine Linux. So please read this tutorial carefully so you may comprehend it in a better helpful way.

Guide: How you can install Docker Engine on Alpine Linux

• 1.Add the Community Repository to the APK Repositories file:
• 2.Update the list of available software:
• 3.Install Docker:
• 4.Configure docker daemon to start automatically on boot:
• 5.Start the docker daemon:
• 6.Verify it’s running:
• Output should look like this:
• Faq
• Final note

I’m thinking about overhauling the infrastructure behind this site (and others) a bit and want to place as many services as possible into Docker containers that can then run inside a small Virtual Machine on Amazon EC2. So I started playing around with some Virtual Machines locally and since Ubuntu would be too boring, I decided to give Alpine Linux a try. It promises to be really lightweight so that seams ideal as a container host running inside a VM.

1.Add the Community Repository to the APK Repositories file:

~# vim /etc/apk/repositories

Add the following line:

http://dl-6.alpinelinux.org/alpine/edge/community

Or, if you are using a mirror, use the URL of the mirror, in my case:

http://mirror1.hs-esslingen.de/pub/Mirrors/alpine/edge/community

2.Update the list of available software:

~# apk update

3.Install Docker:

~# apk add docker

4.Configure docker daemon to start automatically on boot:

~# rc-update add docker boot

5.Start the docker daemon:

~# service docker start

6.Verify it’s running:

~# docker ps

Output should look like this:

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

Great, now I have a running Docker Daemon. Time to build a simple container. I quickly created a very short Dockerfile and ran docker build. After downloading some layers, it failed with a very cryptic error message:

failed to register layer: ApplyLayer exit status 1 stdout: stderr: chmod /bin/mount: permission denied

Searching for this message on Google lead me down many rabbit holes, but ultimately it takes only a single command to make it go away:

sysctl -w kernel.grsecurity.chroot_deny_chmod=0

This disables a security feature inside the Kernel, so it might not be safe for a production environment that runs containers but I think it’s acceptable for the machine that merely builds them.

Faq

Final note

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